// Copyright 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "cc/layers/solid_color_layer_impl.h"

#include <stddef.h>

#include <vector>

#include "cc/animation/animation_host.h"
#include "cc/layers/append_quads_data.h"
#include "cc/layers/solid_color_layer.h"
#include "cc/quads/solid_color_draw_quad.h"
#include "cc/test/fake_impl_task_runner_provider.h"
#include "cc/test/fake_layer_tree_host.h"
#include "cc/test/layer_test_common.h"
#include "cc/test/test_task_graph_runner.h"
#include "cc/trees/layer_tree_host_common.h"
#include "cc/trees/single_thread_proxy.h"
#include "testing/gmock/include/gmock/gmock.h"
#include "testing/gtest/include/gtest/gtest.h"

namespace cc {
namespace {

    TEST(SolidColorLayerImplTest, VerifyTilingCompleteAndNoOverlap)
    {
        std::unique_ptr<RenderPass> render_pass = RenderPass::Create();

        gfx::Size layer_size = gfx::Size(800, 600);
        gfx::Rect visible_layer_rect = gfx::Rect(layer_size);

        FakeImplTaskRunnerProvider task_runner_provider;
        TestTaskGraphRunner task_graph_runner;
        FakeLayerTreeHostImpl host_impl(&task_runner_provider, &task_graph_runner);
        std::unique_ptr<SolidColorLayerImpl> layer = SolidColorLayerImpl::Create(host_impl.active_tree(), 1);
        layer->draw_properties().visible_layer_rect = visible_layer_rect;
        layer->SetBounds(layer_size);
        layer->test_properties()->force_render_surface = true;
        host_impl.active_tree()->SetRootLayerForTesting(std::move(layer));
        host_impl.active_tree()->BuildPropertyTreesForTesting();
        AppendQuadsData data;
        host_impl.active_tree()->root_layer_for_testing()->AppendQuads(
            render_pass.get(), &data);

        LayerTestCommon::VerifyQuadsExactlyCoverRect(render_pass->quad_list,
            visible_layer_rect);
    }

    TEST(SolidColorLayerImplTest, VerifyCorrectBackgroundColorInQuad)
    {
        SkColor test_color = 0xFFA55AFF;

        std::unique_ptr<RenderPass> render_pass = RenderPass::Create();

        gfx::Size layer_size = gfx::Size(100, 100);
        gfx::Rect visible_layer_rect = gfx::Rect(layer_size);

        FakeImplTaskRunnerProvider task_runner_provider;
        TestTaskGraphRunner task_graph_runner;
        FakeLayerTreeHostImpl host_impl(&task_runner_provider, &task_graph_runner);
        std::unique_ptr<SolidColorLayerImpl> layer = SolidColorLayerImpl::Create(host_impl.active_tree(), 1);
        layer->draw_properties().visible_layer_rect = visible_layer_rect;
        layer->SetBounds(layer_size);
        layer->SetBackgroundColor(test_color);
        layer->test_properties()->force_render_surface = true;
        host_impl.active_tree()->SetRootLayerForTesting(std::move(layer));
        host_impl.active_tree()->BuildPropertyTreesForTesting();
        AppendQuadsData data;
        host_impl.active_tree()->root_layer_for_testing()->AppendQuads(
            render_pass.get(), &data);

        ASSERT_EQ(render_pass->quad_list.size(), 1U);
        EXPECT_EQ(
            SolidColorDrawQuad::MaterialCast(render_pass->quad_list.front())->color,
            test_color);
    }

    TEST(SolidColorLayerImplTest, VerifyCorrectOpacityInQuad)
    {
        const float opacity = 0.5f;

        std::unique_ptr<RenderPass> render_pass = RenderPass::Create();

        gfx::Size layer_size = gfx::Size(100, 100);
        gfx::Rect visible_layer_rect = gfx::Rect(layer_size);

        FakeImplTaskRunnerProvider task_runner_provider;
        TestTaskGraphRunner task_graph_runner;
        FakeLayerTreeHostImpl host_impl(&task_runner_provider, &task_graph_runner);
        std::unique_ptr<SolidColorLayerImpl> layer = SolidColorLayerImpl::Create(host_impl.active_tree(), 1);
        layer->draw_properties().visible_layer_rect = visible_layer_rect;
        layer->SetBounds(layer_size);
        layer->draw_properties().opacity = opacity;
        layer->test_properties()->force_render_surface = true;
        host_impl.active_tree()->SetRootLayerForTesting(std::move(layer));
        host_impl.active_tree()->BuildPropertyTreesForTesting();
        AppendQuadsData data;
        host_impl.active_tree()->root_layer_for_testing()->AppendQuads(
            render_pass.get(), &data);

        ASSERT_EQ(render_pass->quad_list.size(), 1U);
        EXPECT_EQ(opacity,
            SolidColorDrawQuad::MaterialCast(render_pass->quad_list.front())
                ->shared_quad_state->opacity);
    }

    TEST(SolidColorLayerImplTest, VerifyOpaqueRect)
    {
        gfx::Size layer_size = gfx::Size(100, 100);
        gfx::Rect visible_layer_rect = gfx::Rect(layer_size);

        scoped_refptr<SolidColorLayer> layer = SolidColorLayer::Create();
        layer->SetBounds(layer_size);
        layer->SetForceRenderSurfaceForTesting(true);

        scoped_refptr<Layer> root = Layer::Create();
        root->AddChild(layer);

        FakeLayerTreeHostClient client;
        TestTaskGraphRunner task_graph_runner;
        auto animation_host = AnimationHost::CreateForTesting(ThreadInstance::MAIN);
        std::unique_ptr<FakeLayerTreeHost> host = FakeLayerTreeHost::Create(
            &client, &task_graph_runner, animation_host.get());
        host->SetRootLayer(root);

        LayerTreeHostCommon::CalcDrawPropsMainInputsForTesting inputs(
            root.get(), gfx::Size(500, 500));
        LayerTreeHostCommon::CalculateDrawPropertiesForTesting(&inputs);

        EXPECT_FALSE(layer->contents_opaque());
        layer->SetBackgroundColor(SkColorSetARGBInline(255, 10, 20, 30));
        EXPECT_TRUE(layer->contents_opaque());
        {
            DebugScopedSetImplThread scoped_impl_thread(host->GetTaskRunnerProvider());
            host->FinishCommitOnImplThread(host->host_impl());
            LayerImpl* layer_impl = host->host_impl()->active_tree()->LayerById(layer->id());

            // The impl layer should call itself opaque as well.
            EXPECT_TRUE(layer_impl->contents_opaque());

            // Impl layer has 1 opacity, and the color is opaque, so the opaque_rect
            // should be the full tile.
            layer_impl->draw_properties().opacity = 1;

            std::unique_ptr<RenderPass> render_pass = RenderPass::Create();

            AppendQuadsData data;
            layer_impl->AppendQuads(render_pass.get(), &data);

            ASSERT_EQ(render_pass->quad_list.size(), 1U);
            EXPECT_EQ(visible_layer_rect.ToString(),
                render_pass->quad_list.front()->opaque_rect.ToString());
        }

        EXPECT_TRUE(layer->contents_opaque());
        layer->SetBackgroundColor(SkColorSetARGBInline(254, 10, 20, 30));
        EXPECT_FALSE(layer->contents_opaque());
        {
            DebugScopedSetImplThread scoped_impl_thread(host->GetTaskRunnerProvider());
            host->FinishCommitOnImplThread(host->host_impl());
            LayerImpl* layer_impl = host->host_impl()->active_tree()->LayerById(layer->id());

            // The impl layer should not call itself opaque anymore.
            EXPECT_FALSE(layer_impl->contents_opaque());

            // Impl layer has 1 opacity, but the color is not opaque, so the opaque_rect
            // should be empty.
            layer_impl->draw_properties().opacity = 1;

            std::unique_ptr<RenderPass> render_pass = RenderPass::Create();

            AppendQuadsData data;
            layer_impl->AppendQuads(render_pass.get(), &data);

            ASSERT_EQ(render_pass->quad_list.size(), 1U);
            EXPECT_EQ(gfx::Rect().ToString(),
                render_pass->quad_list.front()->opaque_rect.ToString());
        }
    }

    TEST(SolidColorLayerImplTest, Occlusion)
    {
        gfx::Size layer_size(1000, 1000);
        gfx::Size viewport_size(1000, 1000);

        LayerTestCommon::LayerImplTest impl;

        SolidColorLayerImpl* solid_color_layer_impl = impl.AddChildToRoot<SolidColorLayerImpl>();
        solid_color_layer_impl->SetBackgroundColor(SkColorSetARGB(255, 10, 20, 30));
        solid_color_layer_impl->SetBounds(layer_size);
        solid_color_layer_impl->SetDrawsContent(true);

        impl.CalcDrawProps(viewport_size);

        {
            SCOPED_TRACE("No occlusion");
            gfx::Rect occluded;
            impl.AppendQuadsWithOcclusion(solid_color_layer_impl, occluded);

            LayerTestCommon::VerifyQuadsExactlyCoverRect(impl.quad_list(),
                gfx::Rect(layer_size));
            EXPECT_EQ(16u, impl.quad_list().size());
        }

        {
            SCOPED_TRACE("Full occlusion");
            gfx::Rect occluded(solid_color_layer_impl->visible_layer_rect());
            impl.AppendQuadsWithOcclusion(solid_color_layer_impl, occluded);

            LayerTestCommon::VerifyQuadsExactlyCoverRect(impl.quad_list(), gfx::Rect());
            EXPECT_EQ(impl.quad_list().size(), 0u);
        }

        {
            SCOPED_TRACE("Partial occlusion");
            gfx::Rect occluded(200, 200, 256 * 3, 256 * 3);
            impl.AppendQuadsWithOcclusion(solid_color_layer_impl, occluded);

            size_t partially_occluded_count = 0;
            LayerTestCommon::VerifyQuadsAreOccluded(
                impl.quad_list(), occluded, &partially_occluded_count);
            // 4 quads are completely occluded, 8 are partially occluded.
            EXPECT_EQ(16u - 4u, impl.quad_list().size());
            EXPECT_EQ(8u, partially_occluded_count);
        }
    }

} // namespace
} // namespace cc
